A friend of mine diagnosed with PCOS, lost all the weight but she still has PCOS but the symptoms subsided as you said. I've asked my doctor and he said that's most likely to happen, there is no true cure for PCOS yet.
I've personally lost about 40 pounds since I've been diagnosed with it. I've started to notice some changes, my hair is less oily and starting to get better. I have less pimples on my face, and its a bit brighter and clearer.
I've also realized that the cramps I used to get are almost gone. The hair on my face is becoming thinner. So yes, its slowly getting better